Exhaust-muffler.



No. 806,714. PATENTED DEC. 5, 1905 J. M. PORTER.

EXHAUST MUFFLER.

APPLICATION FILED 11111.30, 1905.

75 3111mm fez wills Lemma W UNITED STATES PATENT OFFICE.

JOHN M. PORTER. OF PARKERSBURG, WEST VIRGINIA, ASSIGNOR OF ONE- EIGHTHTO JOHN F. LAIRD, OF PARKERSBURG, WEST VIRGINIA.

EXHAUST-MUFFLER.

Specification of Letters Patent.

Patented Dec. 5, 1905.

Application filed March 30, 1905. Serial No. 252,842.

To all whom/it pea/y concern:

Be it known that I, JOHN M. PORTER,a citizen of the United States,residing at Parkersburg, in the county of Wood and State of WestVirginia, have invented certain new and useful Improvements inExhaust-Muffiers; and I do declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same,reference being had to the accompanying drawing, and to the figures ofreference marked thereon, which form a part of this specification.

My invention relates to mufflers, and has for its object to provide adevice of this class which is particularly efiicient in deadening thesound of explosions from internalcombustion engines.

With this object in view my invention consists in the novel constructionof the cells or cylinders of the device, and particularly in theconstruction providing for air-cushioning the exhaust passing into themuiiier.

Referring to the accompanying drawing,t he figure illustrates averticalsection of the muffler, in which 1 indicates the device, and2 the pipeinto which the exhaust is led. The inner end of said pipe is providedwith a perforated cap 8, having perforations of sufiicient number andsize to prevent back pressure. The exhaust passing from said pipe entersthe cell or cylinder 4:, the top 5 of which is at quite a distance fromthe end of the pipe 2, thereby forming an air-cushioning chamber 6 forthe exhaust. The exhaust striking this cushion takes the direction ofthe arrows and passes down to or near the bottom of said cell orcylinder 4 and out into the larger cell or cylinder 7 through a seriesof perforations 8, passing up to the top of said larger cell or cylinder8 and out through the perforated top 9, where the exhaust is againair-cushioned in the chamber 10, formed in the top of the outside cellor cylinder 11, said outside cell on cylinder 1 1 having its cap 12considerably above the perforated top 9, as shown. The exhaust strikingthis air-cushion takes the direction of the arrows and passes down tothe bottom of said cell or cylinder and out through the perforations 13into the atmosphere.

As is clearly shown, the base 14 of the muffler is substantiallycone-shaped and is provided with a series of horizontal platforms 15,which form the bottoms of the several cells or cylinders, while thevertical walls 16 of said base form a rigid bearing and support for thecells or cylinders, said cells or cylinders being passed down over thesaid walls 16, to which they may be secured in any suitable manner.

Having thus fully described my invention, I do not wish to be understoodas limiting myself to the exact construction herein set forth, asvarious slight changes may be made therein which would fall within thelimit and scope of my invention, and I consider myself clearly entitledto all such changes and modiiications.

hat I claim as my invention, and desire to secure by Letters Patent ofthe United States, is

1. A muffler comprising a series of cells or cylinders arranged onewithin the other, each inside cylinder being of a smaller diameter andof a shorter length, substantially as described.

2. A muifler comprising a series of cells or cylinders arranged onewithin the other, said cells or cylinders having a common base andindependent tops or caps, substantially as described.

3. A muffler comprising a series of cells arranged one within the other,said cells or cylinders having independent tops or caps, sub stantiallyas described.

4. A mufiier comprising an inner cell or cylinder into which the exhaustis led, said inner cell or cylinder having one end closed and providedwith an opening near its other end, a cell or cylinder inclosing saidinner cell or cylinder into which the exhaust passes from said innercell or cylinder, said inclosing cell or cylinder being provided with anopening at one end, a second inclosing cell or cylinder into which theexhaust passes from said inclosing cell or cylinder, said secondinclosing cell or cylinder'having one end closed and provided with anopening to allow the exhaust to pass therefrom, said inclosing cell orcylinder being of a larger diameter and longer than said inner cell orcylinder, substantially as described.

5. A muffler comprising an inner cell or cylinder having a closed endagainst which the exhaust strikes, an inclosing cell or cylinderconstructed to receive the exhaust from said inner cell or cylinder, oneend of said inclosing cell being provided with an opening through whichthe exhaust passes, a second inclosing cell having a closed end againstwhich the exhaust strikes passing from said inclosing cell,substantially as described.

6. A muflier comprising an inner cell havmg a closed end forming anaircushion against which the exhaust strikes, an inclo sing cell havingone of its ends provided with an opening through which the exhaustpasses, and a second inclosing cell having one of its ends closed andconstructed to form therein an aircushion beyond the end of saidinclosing cell against which the exhaust strikes passing from saidinclosing cell, substantially as described.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN M. PORTER. Witnesses:

ALBERT KooTz, AGNES M. REILLEY.

